Ignition-dynamo.



C. T. MASON.

IGNITION DYNAMO. APPLICATION map FEB. 14, 1913.

1,178,454. 1 Patented Apr. 4, 1916.

CHARLES THOMAS MASON, OF SUMTER,

PATENT OFFICE.

SOUTH CAROLINA ASSIGNOR, BY MESNE ASSIGNMENTS, TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

IGNITiON-DYNAMO.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed February 14, 1913. Serial No. 748,356.

To'allwhomz'tmay concern:

Be it known that I, CHARLES THOMAS MASON, a citizen of the United States, residing at Sumter, "in the county of Sumter andState of South Carolina, have invented certain new and useful Improvements in "Ignition-Dynamos, of which the following is aspecification, reference being had to the accompanying drawing.

My invention relates to ignition dynamos, commonly calledjmagnetos, and consists of certain improvements in the machine disclosed in my application. for Letters Patent v filed November 21,1913, Serial No. 732681.

These improvements consist of means whereby the generating or armature windings and their core are fixed in relation to the field magnet, the advance and retard of the spark being accomplished by movable pole shoes on the armature core. This sim-' plifies construction. i

-, A further ob ect is to devise a machine of few parts, that .can be cheaply manufactured and'yet attain the highest efiiciency.

Figure 1 is .,a vertical sectional view through the magneto at right angles to the shaft, showing my invention. Fig. 2 isa vertical longitudinal view. Fig. 3 is a view illustrating the operation of advancing or retarding the spark. I

Like figures of reference denotethe same parts Wherever they are shown.

1 denotes a base of non-magnetic material such as commonly employed- To this is clamped in any suitable manner the field I magnets, the ends 2 and. 3 of which are shaped as shown so a bearing is formed in the cut-away portions for the shoulders of the end plates 4 and 5 on the armature structure. The armature structure lncludes a cylinder of non-magnetlc material having embedded in it the portions (3 and 7 of magnetic material forming movable pole shoes for the armature core 17. Portions of this non-magnetic cylinder are showniat Sand 9.

-Inclosed by the cylinder 8, 9 and end plates .4, 5.just described, are the parts N and S forming the rotor of the magneto.

,These parts really constitute rotating polar extensions of the permanent magnet, being virtually in contact with the inner lateral faces of the poles-0f the magnet as they are separated therefrom only by the bodies 10 and 10 of the end plates, which being of magnetic material eliminate gaps in the magnetic circuit. The shafts 11 and 13 of the rotor N, S may also be of'magnetic material so as to further aid in conducting the flux into the poles N and S.

The shaft 11 is provided for revolving the rotor N, S, the center portion 12 of the rotor being non-magnetic. The shaft 13, carrlesa cam 14 which operates any suitable interrupter mechanism, the contacts of which are indicated at 15. A condenser 16 maybe connected in any well known manner in circuit with one of the windings hereinafter mentioned, and this condenser may be located in the lid 16 of the box 18 which is fixed to the end plate 5 and which is therefore movable with the armature structure.

The armature core 17 is fixed in any manner so that its extremities 20 and 21 are in contact with the movable pole shoes .6 and 7 On 17 are placed suitable generating windings such as the usual primary'22, and secondary 23. It will be noted that the portion of the core carrying these windings is integral with the extremities 20 and 21 so there are no'air gaps in. this position of the magnetic circuit.

7 It will now be evident, that the cylinder 8, Qis provided with a suitable lever such as 24, and by moving thelever the pole shoes 6,? carried by cylinder 8, 9' shifted, thereby altering the relative position of the pole shoes in relation to the rotor poles N and S. This is illustrated in Fig.

3, it being presumed that the poles N and such as 30 degrees as indicated. The ends 25 of pole shoe 7 and 25 of 6 will be ad-l vanced toward the advancing poles N, S, so the rotor poles will reach the shoes sooner than if the shoes occupied the position shown in Fig. 1. This advances the spark. generated in the usual manner, 'the interrupter mechanism being attached to and moving with the cylinder 8, 9 so as to always bear a proper relation to the cam 14. To retard the spark, lever 24 may be moved to the right, which moves the shoes 6 and 7 so the poles N and S reach them later.

The machine shown in the drawings is one that is. easy and cheap to manufacture,

It is apparent that the current is many delicate and complicated parts being eliminated, and yet the highest efiiciency secured. The circuits of a dynamo of this description being old, I do not illustrate or describe same, it being sufficient to state that one winding may be employed where a low tension magneto is desired, or a pluralitymf windings where the high tension type is necessary.

The necessity for the construction disclosed, such as the poles N and S in the lateral embrace of the magnet and in lateral contact therewith, and the reason for the increased efiiciency gained thereby, are fully set forth in the pending application hereinbefore mentioned.

I claim:

1. In an ignition dynamo, a magnet, a h llow cylindrical member between the poles of said magnet having magnetic por-.

tions spaced apart from said magnet, end plates on said member in contact with said magnet poles, generating windings, a core for said windings the \poles of which are in contact with the magnetic portions of said cylindrical member, and a rotor within said cylindricall member comprising members of "permanent magnetic polarity irrespective of their position in relation to said magnet.

2. 1n=an ignition dynamo, a magnet, a cylindrical armature structure carried by and between the poles of said magnet and having magnetic portions, forming pole shoes spaced apart from said magnet poles,

a core carrying windings and having polarextremities in contact with said magnetic portions-of said stucture, and a rotor coniprising members of permanent and opposite polarity inclosed thereby, said members constituting extensions of the magnet poles.

3. In an ignition dynamo, a substantially U shaped magnet, a cylindrical armature structure between the poles of said magnet" and having end plates of magnetic material, shoulders on said end plates forming supports projecting throughsaid magnet poles, a rotor having shaft portions projecting through said supports coaxially therewith, and a substantially U shaped core having its ends 'in frictional contact with said cylindrical armature structure with a generating coil upon it, substantially as described.

1-. In an ignition dynamo, a cylinder having magnetizable pole shoes spaced apart,

heads on said cylinder of magnetizable material spaced apart from said pole shoes, at

magnet having its poles in external lateral contact with said heads, a rotor having parts of opposite and permanent polarity in internal lateral contact with said heads, generating windings, a core for said windings having polar extremities in contact with said pole shoes, and means for shifting said cylinder about the path of said rotor, substantially as described.

5. A magneto electric machine comprising a U-shaped permanent field magnet, a rotor ournaled on an axis transversely of the end-wise, an armature structure in juxtaposition to said rotor and including a normally stationary generating winding and a. core with a pair of poles movable with respect thereto and adjustable about the axis of said rotor, a frame of non-magnetic material connecting said poles together and spacing the same apart, and end plates of magnetic material lying between the ends of said rotor and the inner cheeks of said field magnet and completing the magnetic circuit between the ends of said rotor and the inner cheeks of said magnet.

6. A magneto electric machine comprising a U-shaped permanent field magnet, a rotor journaled on an axis transversely of the poles thereof and comprising magnetically separated inductorpoles each having permanent continuously metallic magnetic circuit connection with one of thepoles of said magnet, and an armature structure comprising a normally stationary generating winding, relatively movable pole shoes therefor, a frame of non-magnetic material spacing said pole shoes apart and rigidly connecting them together, and end members of magnetic material supporting said frame, and journaled on the axis of said rotor between the ends thereof and the inner checks of said field magnet and completing the circuit between the ends of said rotor and the inner checks of said magnet.

7. A magneto electric machine comprising a field structure having a normally stationary main body, a rotatable inductor journaled in end-wise relation between the poles of said field magnet and comprising acentral body of non-magnetic material, a pair of L-shaped inductor poles diagonally there of, and oppositely extending stub shafts by which said inductor poles are secured to said central main body, together with an armature structure embracing said rotor, a portion of said armature structure, with interposed non-magnetic material forming a complete and continuous mechanical inclosure for said inductor.

8. A magneto electric machine comprising a lJ-shaped permanent magnet, a rotor journaled'transversely of the poles thereof and comprising a central body of non-magnetic material, inductor poles mounted diagonally thereof "and having a permanent magnetic contact eachjwith a different pole of said electromagnet, oppositely extending stubshafts for 'said rotor secured to said central element of the rotor and connecting said inductor poles thereto, and an armature structure mounted in juxtaposition. to said rotor. Y

9. A magneto electric machine comprising a U-shaped permanent magnet, a rotor jourpoles of said magnet, and embraced thereby III trically with the axis of said rotor, whereby said pole shoes may be adjusted angularly with respect'to said axis. w

10. A- magneto electric machine comprising field and armature structures one of which is stationary and the other has rotatable'polar extensions, relatively movable pole shoes for the normally stationary member, composed of laminationsof magnetic material, and a frame of non-magnetic material mounted concentrically with said rotatable polar extensions and binding said laminations together. I

11. An ignition dynamo comprising a field magnet, a rotor composed of two polar extensions permanently andunchangeably connected to and magnetized by the respec- .tive poles of said magnet, an inclosure for said rotor comprising magnetic pole shoes conforming in figure to the figure described by the rotor in its rotation, and non-magnetic material connecting said pole shoes so as to make the inclosure mechanically continuous about the rotor, and an armature copies of this patent may be obtained for structure having a generating coil and core connected to said pole shoes.

12. In a magneto generator, a field magnet, an armature structure having a generat-' ing coil and core, the polar extremities of the field magnet and the polar extremities-of the armature structure being in proximity to each other, a rotor composed of two magnetic. elements adapted to convey flux from the field magnet poles to the armature structure poles, and a pair of pole shoes included in the magnetic circuit, movable for purposes of timing, and connected by non-magnetic material shaped to form an .inclosure for the rotor.

13. In a magneto generator, a rotor, pole pieces in operative relation tosaid rotoigiand a continuous housing for the rotor having said pole pieces included in and forming a part of its walls, together with a field magnet permanently magnetizing said rotor, and a generating coil having a core connected to said pole pieces. I i i '14. In a magneto generator, a base and housing, said a housing adapted to receive and inclose a rotor, end'plates fitted to the housing and carrying bearings for the rotor spindle ends, a pair of pole shoes included in and formin a part of the housing, with their inner aces conforming in shape to the figure generated by the rotor in its rotation, and a secondary or generating magnetic circuit connected to said-pole shoes.

In testimony whereof I hereunto atfix my signature in the presence of two Witnesses. CHARLES THOMAS MASON. Witnesses:

H. R. VAN DEVENTER, A. H. STUBBs.

five cents each, by addressing the Commissioner of Patents,

walhi'ngtomnfl. 

